#include "htmlitemdelegate.h"
#include <QApplication>
#include <QTextDocument>
#include <QAbstractTextDocumentLayout>
#include <QPainter>

HTMLItemDelegate::HTMLItemDelegate()
{
}
/*
void HTMLItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem & option, const QModelIndex &index) const
{
    QStyleOptionViewItemV4 options = option;
    initStyleOption(&options, index);

    painter->save();

    QTextDocument doc;
    doc.setHtml(options.text);

    options.text = "";
    options.widget->style()->drawControl(QStyle::CE_ItemViewItem, &options, painter);

    // shift text right to make icon visible
    QSize iconSize = options.icon.actualSize(options.rect.size());
    painter->translate(options.rect.left()+iconSize.width(), options.rect.top());
    QRect clip(0, 0, options.rect.width()+iconSize.width(), options.rect.height());

    //doc.drawContents(painter, clip);

    painter->setClipRect(clip);
    QAbstractTextDocumentLayout::PaintContext ctx;
    // set text color to red for selected item
    if (option.state & QStyle::State_Selected)
        ctx.palette.setColor(QPalette::Text, QColor("red"));
    ctx.clip = clip;
    doc.documentLayout()->draw(painter, ctx);

    painter->restore();

}*/
void HTMLItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem & option, const QModelIndex &index) const
{
    QStyleOptionViewItemV4 optionV4 = option;
    initStyleOption(&optionV4, index);

    QStyle *style = optionV4.widget? optionV4.widget->style() : QApplication::style();

    QString html = QString(index.data(Qt::UserRole).toString()).arg(optionV4.text);

    QTextDocument doc;
    doc.setHtml(html);

    /// Painting item without text
    optionV4.text = QString();
    style->drawControl(QStyle::CE_ItemViewItem, &optionV4, painter);

    QAbstractTextDocumentLayout::PaintContext ctx;

    // Highlighting text if item is selected
    if (optionV4.state & QStyle::State_Selected)
        ctx.palette.setColor(QPalette::Text, optionV4.palette.color(QPalette::Active, QPalette::HighlightedText));

    QRect textRect = style->subElementRect(QStyle::SE_ItemViewItemText, &optionV4);
    painter->save();
    painter->translate(textRect.topLeft());
    painter->setClipRect(textRect.translated(-textRect.topLeft()));
    doc.documentLayout()->draw(painter, ctx);
    painter->restore();
}

QSize HTMLItemDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    QStyleOptionViewItemV4 optionV4 = option;
    initStyleOption(&optionV4, index);

    QTextDocument doc;
    doc.setHtml(optionV4.text);
    doc.setTextWidth(optionV4.rect.width());
    return QSize(doc.idealWidth(), doc.size().height());
}

